Magnetic Compass; Engine Oil Pressure Gauge - Thrush Aircraft S2R-R1340 Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2R-R1340 THRUSH 600
INSTRUMENT TROUBLE SHOOTING CHART, Table 8-1, Page 2
PROBLEM
Static pressure irregular.
Hands oscillate.
Leak in airspeed or
vertical speed indicator
installations.
Compass not properly
compensated
Excessive card
error
External magnetic
interference
Insufficient liquid
Excessive card
Excessive vibration of
oscillation
compass
Card element
Compass excessively
not level,
compensated
sluggish
Leaking float chamber
due to broken cover glass
or case, or defective
Liquid leakage
sealing gaskets, weak or
from case
detached card magnets,
pivot friction, or broken
jewel
Worn or bent movement
Dirty or corroded
Gauge has
movement
erratic operation
Pointer bent and rubbing
on dial, dial screw or
glass
Effective: 01/01/08
AIRCRAFT MAINTENANCE MANUAL
ALTIMETER (Continued)
PROBABLE CAUSE

MAGNETIC COMPASS

ENGINE OIL PRESSURE GAUGE

REMEDY
Check lines for obstructions or leaks.
Check static source. Blow out lines,
tighten connections. Clean static
source.
Check other instruments and system
plumbing for leaks and obstructions.
Blow out lines, tighten connections.
Swing compass and compensate.
Locate and eliminate interference.
Replace compass.
Remove cause of vibration.
Back compensating screws off to
remove all compensation, then re-
compensate compass.
Replace compass.
Replace instrument.
Replace instrument.
Replace instrument.
8-13